/* =========================================================
   SARISHMA RAI — PORTFOLIO WEBSITE
   Premium dark-mode design with fluid animations
   ========================================================= */

/* ── CSS Custom Properties ── */
:root {
  /* Palette */
  --bg-primary:    hsl(228, 24%, 8%);
  --bg-secondary:  hsl(228, 22%, 12%);
  --bg-card:       hsl(228, 20%, 14%);
  --bg-card-hover: hsl(228, 20%, 17%);

  --text-primary:   hsl(0, 0%, 95%);
  --text-secondary: hsl(228, 10%, 60%);
  --text-muted:     hsl(228, 10%, 40%);

  --accent:        hsl(265, 89%, 66%);
  --accent-light:  hsl(265, 89%, 76%);
  --accent-dark:   hsl(265, 80%, 50%);
  --accent-glow:   hsla(265, 89%, 66%, .35);

  --gradient-primary: linear-gradient(135deg, hsl(265, 89%, 66%), hsl(330, 80%, 60%));
  --gradient-hero:    linear-gradient(160deg, hsl(265, 60%, 14%) 0%, hsl(228, 24%, 8%) 50%, hsl(330, 40%, 12%) 100%);

  --border:   hsl(228, 18%, 20%);
  --glass:    hsla(228, 24%, 14%, .6);
  --glass-border: hsla(265, 60%, 50%, .12);

  /* Typography */
  --ff-heading: 'Outfit', sans-serif;
  --ff-body:    'Inter', sans-serif;

  /* Spacing */
  --section-padding: 6rem 0;
  --container-width: 1140px;

  /* Transitions */
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --transition-fast: .25s var(--ease-out);
  --transition-med:  .5s var(--ease-out);
  --transition-slow: .8s var(--ease-out);

  /* Radius */
  --radius-sm: .5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-full: 50%;
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-dark) var(--bg-secondary);
}
body {
  font-family: var(--ff-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent-dark); border-radius: 3px; }

/* ── Preloader ── */
#preloader {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-primary);
  transition: opacity .6s ease, visibility .6s ease;
}
#preloader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader { position: relative; width: 80px; height: 80px; }
.loader-text {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--ff-heading); font-size: 2rem; font-weight: 800;
  background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.loader-ring {
  width: 100%; height: 100%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Cursor Glow ── */
#cursor-glow {
  position: fixed; width: 600px; height: 600px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
  transform: translate(-50%, -50%);
  opacity: 0; transition: opacity .4s;
}
body:hover #cursor-glow { opacity: 1; }

/* ── Container ── */
.container {
  width: 90%;
  max-width: var(--container-width);
  margin: 0 auto;
}

/* ── Navbar ── */
#header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: hsla(228, 24%, 8%, .75);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
#header.scrolled {
  border-bottom-color: var(--glass-border);
  box-shadow: 0 4px 30px hsla(0,0%,0%,.25);
}
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  width: 90%; max-width: var(--container-width);
  margin: 0 auto; height: 72px;
}
.nav-logo {
  font-family: var(--ff-heading); font-weight: 700; font-size: 1.25rem;
  letter-spacing: -.02em;
}
.logo-bracket { color: var(--accent); }
.logo-dot { color: var(--accent-light); }
.nav-links {
  display: flex; gap: 2rem;
}
.nav-link {
  font-size: .9rem; font-weight: 500;
  color: var(--text-secondary);
  position: relative; padding: .25rem 0;
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: ''; position: absolute;
  bottom: -2px; left: 0; width: 0; height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transition: width var(--transition-fast);
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

/* Hamburger */
.nav-toggle { display: none; width: 28px; height: 20px; position: relative; }
.hamburger, .hamburger::before, .hamburger::after {
  position: absolute; left: 0; width: 100%; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.hamburger { top: 50%; transform: translateY(-50%); }
.hamburger::before { content: ''; top: -8px; }
.hamburger::after  { content: ''; top:  8px; }
.nav-toggle.active .hamburger { background: transparent; }
.nav-toggle.active .hamburger::before { top: 0; transform: rotate(45deg); }
.nav-toggle.active .hamburger::after  { top: 0; transform: rotate(-45deg); }

/* ── Section Commons ── */
.section { padding: var(--section-padding); position: relative; }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-subtitle {
  font-size: .85rem; font-weight: 500; text-transform: uppercase;
  letter-spacing: .12em; color: var(--accent); margin-bottom: .5rem;
}
.section-title {
  font-family: var(--ff-heading); font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800; letter-spacing: -.02em;
}
.highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.section-line {
  width: 60px; height: 4px; margin: 1rem auto 0;
  background: var(--gradient-primary); border-radius: 2px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: .6rem;
  padding: .85rem 1.8rem; border-radius: 50px;
  font-size: .95rem; font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}
.btn-primary {
  background: var(--gradient-primary); color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); }
.btn-outline {
  border: 2px solid var(--accent); color: var(--accent);
}
.btn-outline:hover {
  background: var(--accent); color: #fff;
  transform: translateY(-2px);
}

/* ── HERO ── */
.hero-section {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--gradient-hero);
  overflow: hidden; padding-top: 72px;
}
.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.shape {
  position: absolute; border-radius: var(--radius-full);
  filter: blur(100px); opacity: .25;
}
.shape-1 { width: 500px; height: 500px; background: hsl(265, 89%, 50%); top: -10%; right: -8%; }
.shape-2 { width: 400px; height: 400px; background: hsl(330, 80%, 55%); bottom: -10%; left: -5%; }
.shape-3 { width: 300px; height: 300px; background: hsl(200, 80%, 50%); top: 40%; left: 30%; opacity: .12; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem; align-items: center;
  max-width: var(--container-width); width: 90%; margin: 0 auto;
}
.hero-greeting {
  font-size: 1.1rem; color: var(--accent); font-weight: 500;
  margin-bottom: .5rem;
}
.hero-name {
  font-family: var(--ff-heading); font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800; line-height: 1.15; letter-spacing: -.03em;
  margin-bottom: .75rem;
}
.hero-tagline {
  font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 1rem;
  min-height: 1.8em;
}
.typed-cursor {
  font-weight: 300; animation: blink .7s step-end infinite;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }

.hero-description {
  font-size: .95rem; color: var(--text-secondary);
  max-width: 480px; margin-bottom: 2rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2rem; }
.hero-socials { display: flex; gap: 1rem; }
.social-link {
  width: 42px; height: 42px; border-radius: var(--radius-full);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--text-secondary);
  transition: var(--transition-fast);
}
.social-link:hover {
  border-color: var(--accent); color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 4px 15px var(--accent-glow);
}

/* Hero Image */
.hero-image-wrapper {
  position: relative; display: flex; align-items: center; justify-content: center;
}
.hero-image {
  width: 340px; height: 340px; object-fit: cover;
  border-radius: var(--radius-lg);
  position: relative; z-index: 2;
  box-shadow: 0 20px 60px hsla(0,0%,0%,.4);
}
.hero-image-border {
  position: absolute; width: 360px; height: 360px;
  border: 2px solid var(--accent);
  border-radius: var(--radius-lg);
  top: 50%; left: 50%;
  transform: translate(-46%, -46%);
  z-index: 1; opacity: .5;
}
.hero-image-dots {
  position: absolute; width: 120px; height: 120px;
  bottom: -15px; right: -15px; z-index: 1;
  background-image: radial-gradient(var(--accent-dark) 1.5px, transparent 1.5px);
  background-size: 12px 12px; opacity: .5;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
  color: var(--text-muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .1em;
}
.scroll-line {
  width: 1px; height: 40px; background: var(--accent);
  animation: scrollPulse 1.8s ease-in-out infinite;
}
@keyframes scrollPulse { 0%,100% { transform: scaleY(.5); opacity:.4; } 50% { transform: scaleY(1); opacity:1; } }

/* ── ABOUT ── */
.about-section { background: var(--bg-secondary); }
.about-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem; margin-bottom: 3rem;
}
.about-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 2rem;
  text-align: center;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.about-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 12px 40px hsla(265, 89%, 50%, .1);
}
.about-icon {
  width: 60px; height: 60px; margin: 0 auto 1rem;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; border-radius: var(--radius-full);
  background: var(--gradient-primary); color: #fff;
}
.about-card-title {
  font-family: var(--ff-heading); font-weight: 700; font-size: 1.15rem;
  margin-bottom: .5rem;
}
.about-card-text { font-size: .88rem; color: var(--text-secondary); }

.about-bio {
  max-width: 750px; margin: 0 auto; text-align: center;
  color: var(--text-secondary); font-size: .95rem;
}
.about-bio p + p { margin-top: 1rem; }
.about-bio strong { color: var(--text-primary); }

/* ── SKILLS ── */
.skills-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}
.skill-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 1.5rem;
  text-align: center;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.skill-card:hover {
  transform: translateY(-5px); border-color: var(--accent);
  box-shadow: 0 10px 30px hsla(265, 89%, 50%, .1);
}
.skill-icon {
  font-size: 2rem; margin-bottom: .75rem;
  background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.skill-name {
  font-family: var(--ff-heading); font-weight: 600; font-size: .95rem;
  margin-bottom: .75rem; color: var(--text-primary);
}
.skill-bar {
  width: 100%; height: 6px; border-radius: 3px;
  background: var(--border); overflow: hidden;
}
.skill-fill {
  height: 100%; width: 0;
  background: var(--gradient-primary);
  border-radius: 3px;
  transition: width 1.2s var(--ease-out);
}

/* ── PROJECTS ── */
.projects-section { background: var(--bg-secondary); }
.projects-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}
.project-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-md); overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.project-card:hover {
  transform: translateY(-8px); border-color: var(--accent);
  box-shadow: 0 16px 50px hsla(265, 89%, 50%, .12);
}
.project-image-wrapper { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.project-image {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--transition-med);
}
.project-card:hover .project-image { transform: scale(1.06); }
.project-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center; gap: 1rem;
  background: hsla(228, 24%, 8%, .7);
  opacity: 0; transition: opacity var(--transition-fast);
}
.project-card:hover .project-overlay { opacity: 1; }
.project-link {
  width: 48px; height: 48px; border-radius: var(--radius-full);
  border: 2px solid #fff; color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; transition: var(--transition-fast);
  transform: translateY(10px);
}
.project-card:hover .project-link { transform: translateY(0); }
.project-link:hover { background: var(--accent); border-color: var(--accent); }
.project-info { padding: 1.5rem; }
.project-title {
  font-family: var(--ff-heading); font-weight: 700; font-size: 1.15rem;
  margin-bottom: .5rem;
}
.project-desc { font-size: .85rem; color: var(--text-secondary); margin-bottom: 1rem; }
.project-tags { display: flex; gap: .5rem; flex-wrap: wrap; }
.tag {
  padding: .3rem .75rem; border-radius: 50px;
  font-size: .75rem; font-weight: 500;
  background: hsla(265, 89%, 66%, .1); color: var(--accent-light);
  border: 1px solid hsla(265, 89%, 66%, .15);
}

/* ── CONTACT ── */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem;
  align-items: start;
}
.contact-heading {
  font-family: var(--ff-heading); font-size: 1.6rem; font-weight: 700;
  margin-bottom: 1rem;
}
.contact-text { color: var(--text-secondary); font-size: .92rem; margin-bottom: 2rem; }
.contact-details { display: flex; flex-direction: column; gap: 1.25rem; margin-bottom: 2rem; }
.contact-item {
  display: flex; align-items: center; gap: 1rem;
}
.contact-item-icon {
  width: 48px; height: 48px; border-radius: var(--radius-full);
  background: var(--gradient-primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.contact-item-label { font-size: .8rem; color: var(--text-muted); margin-bottom: .15rem; }
.contact-item-value { font-size: .92rem; color: var(--text-secondary); }
a.contact-item-value:hover { color: var(--accent); }
.contact-socials { display: flex; gap: .8rem; }
.social-circle {
  width: 44px; height: 44px; border-radius: var(--radius-full);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--text-secondary);
  transition: var(--transition-fast);
}
.social-circle:hover {
  border-color: var(--accent); color: #fff;
  background: var(--accent);
  transform: translateY(-3px); box-shadow: 0 4px 12px var(--accent-glow);
}

/* Contact Form */
.contact-form {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 2rem;
}
.form-group {
  position: relative; margin-bottom: 1.5rem;
}
.form-input {
  width: 100%; padding: 1rem 0 .5rem;
  background: transparent; border: none;
  border-bottom: 2px solid var(--border);
  font-family: var(--ff-body); font-size: .95rem;
  color: var(--text-primary); outline: none;
  transition: border-color var(--transition-fast);
}
.form-textarea { resize: vertical; min-height: 100px; }
.form-label {
  position: absolute; top: 1rem; left: 0;
  font-size: .9rem; color: var(--text-muted);
  pointer-events: none;
  transition: var(--transition-fast);
}
.form-input:focus ~ .form-label,
.form-input:not(:placeholder-shown) ~ .form-label {
  top: -.35rem; font-size: .72rem; color: var(--accent);
}
.form-input:focus { border-bottom-color: var(--accent); }
.form-line {
  position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-fast);
}
.form-input:focus ~ .form-line { width: 100%; }

.btn-submit { width: 100%; justify-content: center; margin-top: .5rem; }
.form-status {
  margin-top: 1rem; text-align: center; font-size: .85rem;
  color: var(--accent); opacity: 0;
  transition: opacity var(--transition-fast);
}
.form-status.visible { opacity: 1; }

/* ── FOOTER ── */
.footer {
  background: var(--bg-secondary); border-top: 1px solid var(--border);
  padding: 2rem 0;
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
}
.footer-logo { font-family: var(--ff-heading); font-weight: 700; font-size: 1.1rem; }
.footer-copy { font-size: .82rem; color: var(--text-muted); }
.heart-beat { color: var(--accent); animation: heartBeat 1.2s ease infinite; }
@keyframes heartBeat { 0%,100% { transform: scale(1); } 50% { transform: scale(1.25); } }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: .85rem; color: var(--text-secondary); transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--accent); }

/* ── Back to Top ── */
.back-to-top {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 900;
  width: 48px; height: 48px; border-radius: var(--radius-full);
  background: var(--gradient-primary); color: #fff; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transform: translateY(20px); pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: all; }
.back-to-top:hover { transform: translateY(-4px); }

/* ── Scroll Animations ── */
.animate-on-scroll {
  opacity: 0; transform: translateY(40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.animate-on-scroll.visible {
  opacity: 1; transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-content { order: 2; }
  .hero-image-wrapper { order: 1; justify-self: center; }
  .hero-description { margin: 0 auto 2rem; }
  .hero-actions { justify-content: center; }
  .hero-socials { justify-content: center; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { --section-padding: 4rem 0; }
  .nav-links {
    position: fixed; top: 0; right: -100%; width: 70%; height: 100vh;
    background: var(--bg-secondary); border-left: 1px solid var(--border);
    flex-direction: column; justify-content: center; align-items: center;
    gap: 2rem; transition: right var(--transition-fast);
    z-index: 998;
  }
  .nav-links.open { right: 0; }
  .nav-toggle { display: block; z-index: 999; }
  .hero-image { width: 260px; height: 260px; }
  .hero-image-border { width: 280px; height: 280px; }
  .projects-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2rem; }
  .btn { padding: .7rem 1.4rem; font-size: .85rem; }
  .about-grid { grid-template-columns: 1fr; }
}